Nanocomposite composition having high barrier property

Abstract

A nanocomposite composition having a high barrier property and an article manufactured therefrom are provided. A compatibilizer/intercalated clay nanocomposite and a resin having a barrier property/intercalated clay nanocomposite are dispersed as a specific structure in a polyolefin resin. Accordingly, the compositon has superior mechanical strength, and superior oxygen, organic solvent, and moisture barrier properties.

1 . A dry-blended nanocomposite composition comprising: 
 40 to 96 parts by weight of a polyolefin resin;    1 to 30 parts by weight of a compatibilizer/intercalated clay nanocomposite; and    0.5 to 60 parts by weight of a nanocomposite having a barrier property, including an intercalated clay and at least one resin having a barrier property, selected from the group consisting of an ethylene-vinyl alcohol copolymer, a polyamide, an ionomer and a polyvinyl alcohol.    
   
   
       2 . The composition of  claim 1 , wherein the weight ratio of the resin having a barrier property to the intercalated clay in the nanocomposite is 58.0:42.0 to 99.9:0.1.  
   
   
       3 . The composition of  claim 1 , wherein the intercalated clay is at least one compound selected from the group consisting of montmorillonite, bentonite, kaolinite, mica, hectorite, fluorohectorite, saponite, beidelite, nontronite, stevensite, vermiculite, hallosite, volkonskoite, suconite, magadite, and kenyalite.  
   
   
       4 . The composition of  claim 1 , wherein the intercalated clay comprises 1 to 45 wt % of an organic material.  
   
   
       5 . The composition of  claim 4 , wherein the organic material has at least one functional group selected from the group consisting of from primary ammonium to quaternary ammonium, phosphonium, maleate, succinate, acrylate, benzylic hydrogen, oxazoline, and dimethyldistearylammonium.  
   
   
       6 . The composition of  claim 1 , wherein the ethylene-vinyl alcohol copolymer contains 10 to 50 mol % of ethylene.  
   
   
       7 . The composition of  claim 1 , wherein the polyamide is nylon 4.6, nylon 6, nylon 6.6, nylon 6.10, nylon 7, nylon 8, nylon 9, nylon 11, nylon 12, nylon 46, MXD6, amorphous polyamide, a copolymerized polyamide containing at least two of these, or a mixture of at least two of these.  
   
   
       8 . The composition of  claim 7 , wherein the glass transition temperature of the amorphous polyamide is about 80-130° C.  
   
   
       9 . The composition of  claim 7 , wherein the amorphous polyamide is selected from the group consisting of hexamethylenediamine isophthalamide, hexamethylene diamine isophthalamide/terephthalamide terpolymer having a ratio of isophthalic acid/terephthalic acid of 99/1 to 60/40, a mixture of 2,2,4- and 2,4,4-trimethylhexamethylenediamine terephthalamide, and a copolymer of hexamethylenediamine or 2-methylpentamethylenediamine and isophthalic acid, terephthalic acid, or a mixture thereof.  
   
   
       10 . The composition of  claim 9 , wherein the amorphous polyamide is hexamethylene diamine isophthalamide/terephthalamide terpolymer having a ratio of isophthalic acid to terephthalic acid of 70:30.  
   
   
       11 . The composition of  claim 1 , wherein the ionomer has a melt index of 0.1 to 10 g/10 min (190° C., 2,160 g).  
   
   
       12 . The composition of  claim 1 , wherein the compatibilizer is one or more compounds selected from the group consisting of an ethylene-ethylene anhydride-acrylic acid copolymer, an ethylene-ethyl acrylate copolymer, an ethylene-alkyl acrylate-acrylic acid copolymer, a maleic anhydride modified (graft) high-density polyethylene, a maleic anhydride modified (graft) linear low-density polyethylene, an ethylene-alkyl (meth)acrylate-(meth)acrylic acid copolymer, an ethylene-butyl acrylate copolymer, an ethylene-vinyl acetate copolymer, and a maleic anhydride modified (graft) ethylene-vinyl acetate copolymer.  
   
   
       13 . The composition of  claim 1 , wherein the weight ratio of the compatibilizer to the intercalated clay in the compatibilizer/intercalated clay nanocomposite is 85:15 to 99:1.  
   
   
       14 . An article manufactured from the nanocomposite composition of  claim 1 .  
   
   
       15 . The article of  claim 14 , being a container, a film, a pipe, or a sheet.  
   
   
       16 . The article of  claim 14 , manufactured through blow molding, extrusion molding, pressure molding, or injection molding.